Description: A vulnerability has been reported in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.
The vulnerability is caused due to a boundary error in the implementation of the Next Hop Resolution Protocol. This can be exploited to cause a buffer overflow by sending a specially crafted NHRP packet containing an invalid total length in the fixed header.
Successful exploitation requires that support for the Next Hop Resolution Protocol is enabled.
Solution: Apply updated versions or vendor workarounds (please see the vendor advisory for details).
Provided and/or discovered by: The vendor credits Martin Kluge.
Changelog: 2007-08-09: Updated "Description" section with additional information.
2007-08-10: Added link to US-CERT.
2007-08-15: Added CVE reference.
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